#include <NXP/iolpc1768.h>
#include "lpc17xx_nvic.h"
#include "core_cm3.h"
#include "lpc17xx_gpio.h"
#include "defines.h"
#include "func.h"
#include "externs.h"
#include "intrinsics.h"
#include "lpc17xx.h"
#define BUF1 0x00
#define BUF2 0x01
#define BYTE_DUMMY 0x00 //ÑÆÔª×Ö½Ú
#define BUF_HEAD 0x0000 //»º³åÊ×µØÖ·
#define PAGE_HEAD 0x0000 //FLASHÒ³Ê×µØÖ·
#define AT45DB321_BYTE_PER_PAGE 528 //AT45DB321 ÿҳ528×Ö½Ú
#define RECORD_SIZE 80 //528/6=80 ÿ¼Ç¼×î¶à80×Ö½Ú
volatile unsigned char data[528];
/* SPSR */
#define SPIF 7
#define WCOL 6
/* bits 5-1 reserved */
#define SPI2X 0
/* SPCR */
#define SPIE 7
#define SPE 6
#define DORD 5
#define MSTR 4
#define CPOL 3
#define CPHA 2
#define SPR1 1
#define SPR0 0
/* SFIOR */
#define ADTS2 7
#define ADTS1 6
#define ADTS0 5
/* bit 4 reserved */
#define ACME 3
#define PUD 2
#define PSR2 1
#define PSR10 0
#define RESET_0 FIO0PIN&=~(1<<5)
#define RESET_1 FIO0PIN|=(1<<5)
#define WP_0 FIO0PIN&=~(1<<4)
#define WP_1 FIO0PIN|=(1<<4)
#define AT_SO FIO0PIN&(1<<8)
//#define SI_0 PORTB&=~(1<<SI)
//#define SI_1 PORTB|=(1<<SI)
#define CS_0 FIO0PIN&=~(1<<6)
#define CS_1 FIO0PIN|=(1<<6)
#define SI_0 FIO0PIN&=~(1<<9)
#define SI_1 FIO0PIN|=(1<<9)
#define SCK_SPI_0 FIO0PIN&=~(1<<7)
#define SCK_SPI_1 FIO0PIN|=(1<<7)
//***************************************************
void SPI_WriteByte(BYTE spi_write_data)
{
BYTE i;
CS_0;
delay(2);
for(i=0;i<8;i++) //send 8 bits
{
SCK_SPI_0;
if((spi_write_data<<i)&0x80)
SI_1;
else
SI_0;
delay(2);
SCK_SPI_1;
delay(2);
}
}
//******************************************************
BYTE SPI_ReadByte(void)
{
BYTE i,temp;
CS_0;
delay(2); // bit bit_in;
temp=0x00;//initialize the data output
for(i=0;i<8;i++)
{
SCK_SPI_0;
delay(2);
SCK_SPI_1;
delay(2);
temp <<= 1;
if(AT_SO)
temp |=1;
else
temp |=0;
}
return (temp);
}
//*********************************************************************************
void AT45_Write_Buffer(unsigned char buffer_choice,unsigned int address, unsigned char *string, unsigned int buf_len)
{
unsigned int i;
unsigned char t;
CS_0; //active the device
delay(2);
if(buffer_choice)
SPI_WriteByte(0x87); //buffer 2
else
SPI_WriteByte(0x84); //buffer 1
SPI_WriteByte(BYTE_DUMMY); //xxxx xxxx don¡¯t care bits
t=(BYTE)((address>>8)&0x03);
SPI_WriteByte(t); //BFA9,BFA8
SPI_WriteByte((BYTE)address); //BFA7~BFA0
for(i=0;i<buf_len;i++) /*buffer. More detail in the datasheet.*/
{
SPI_WriteByte(string[i]);
delay(30);
}
CS_1; //inactive the device
delay(2);
}
//***************************************************************
void AT45_Read_Buffer(unsigned char buffer_choice,unsigned int address,unsigned int buf_len,unsigned char * string)
{
unsigned int i;
unsigned char tp;
CS_0; //active the device
delay(2);
if(buffer_choice)
SPI_WriteByte(0x0D6); //buffer 2
else
SPI_WriteByte(0x0D4); //buffer 1
SPI_WriteByte(BYTE_DUMMY); //xxxx xxxx
tp=(BYTE)((address>>8)&0x03);
SPI_WriteByte(tp); //BFA9,BFA8
SPI_WriteByte((BYTE)address); //BFA7~BFA0
SPI_WriteByte(BYTE_DUMMY); //xxxx xxxx
//now read the user_data
for(i=0;i<buf_len;i++)
string[i]=SPI_ReadByte();
CS_1;
delay(2);
}
//*************************************************************
void DataFlashReset(void) //¸´Î»´æ´¢Æ÷
{
CS_0;
delay(2);
RESET_0;
delay(5);
CS_1;
delay(2);
RESET_1;
delay(2);
}
//*************************************************************
void ReadID(void)
{
BYTE i;
CS_0;
delay(2);
SPI_WriteByte(0X9F);
for(i=0;i<4;i++)
d[i]=SPI_ReadByte();
CS_1;
delay(2);
}
//*************************************************************
void IsBusy(void)
{
while(!(ReadFlashState()&0x80))
{
;
}
}
//*************************************************************
unsigned char AT45_MemoryByteRead(unsigned int page,unsigned int address)
{
// unsigned char temp=0;
IsBusy();
CS_0;
SPI_WriteByte(0xd2);// MEM_PAGE_READ //0x68 ÎÒ¸ÄΪÁË0xD2Ò³¶Á 0XE8
SPI_WriteByte((unsigned char)(page>>6)); //µØÖ·×î¸ß×Ö½Ú
SPI_WriteByte((unsigned char)((page<<2)|(address>>8)));
SPI_WriteByte((unsigned char)address);//µØÖ·µÍ×Ö½Ú
SPI_WriteByte(BYTE_DUMMY);//32 don't care bits
SPI_WriteByte(BYTE_DUMMY);
SPI_WriteByte(BYTE_DUMMY);
SPI_WriteByte(BYTE_DUMMY);
SPI_WriteByte(0xff);
CS_1;
return 1;
// return SPDR;
}
//*************************************
void AT45_MemoryRead(unsigned int page,unsigned int address,unsigned int num,unsigned char * string)
{
unsigned int i=0;
unsigned char temp=0;
IsBusy();
CS_0;
delay(2);
//send command stream of data
SPI_WriteByte(0xD2);// MEM_PAGE_READ //0x68 ÎÒ¸ÄΪÁË0xD2Ò³¶Á 0XE8
SPI_WriteByte((BYTE)(page>>6)); //µØÖ·×î¸ß×Ö½Ú
temp = (((BYTE)page)<<2);
temp = temp|((address>>8)&0x03);//µØÖ·¸ß×Ö½Ú
SPI_WriteByte(temp);
SPI_WriteByte((BYTE)address);//µØÖ·µÍ×Ö½Ú
SPI_WriteByte(BYTE_DUMMY);//32 don't care bits
SPI_WriteByte(BYTE_DUMMY);
SPI_WriteByte(BYTE_DUMMY);
SPI_WriteByte(BYTE_DUMMY);
//now read the user_data
//2048*264=538624,but don't read so many
//bytes at one time.
for(i=0;i<num;i++)
{
string[i]=SPI_ReadByte();
}
CS_1;
delay(10);
IsBusy();
}
///***********************************************
void AT45_EraseBlock(WORD block)//Block(0~1023)
{
BYTE temp;
CS_0;
delay(2);
//send command stream of data
SPI_WriteByte(0x50);// MEM_BLOCK_ERASE
SPI_WriteByte((BYTE)(block>>3));//µØÖ·×î¸ß×Ö½Ú
temp = (((BYTE)block)<<5);
SPI_WriteByte(temp); //µØÖ·¸ß×Ö½Ú
SPI_WriteByte(BYTE_DUMMY); //µØÖ·µÍ×Ö½Ú
CS_1;
delay(100);
IsBusy();
}
//******************************************************************************
void AT45_Memory_PageWrite(unsigned char buffer_choice,unsigned int page,unsigned int address,unsigned int num,unsigned char *string)
{
//memory to buffer.
unsigned int i;
unsigned char tt;
CS_0;
delay(2);
if(buffer_choice)
SPI_WriteByte(0x55); //buffer 2
else
SPI_WriteByte(0x53); //buffer 1
tt=(BYTE)(page >>6);
SPI_WriteByte(tt); // 6 to 7
tt=(BYTE)(page <<2);
SPI_WriteByte(tt);
SPI_WriteByte(BYTE_DUMMY);
CS_1;
delay(50);
IsBusy();
//write buffer
CS_0; //active the device
delay(2);
if(buffer_choice)
SPI_WriteByte(0x87); //buffer 2
else
SPI_WriteByte(0x84); //buffer 1
SPI_WriteByte(BYTE_DUMMY); //xxxx xxxx don¡¯t care bits
tt=(BYTE)((address>>8)&0x03);
SPI_WriteByte(tt); //BFA9,BFA8
SPI_WriteByte((BYTE)address); //BFA7~BFA0
for(i=0;i<num;i++) /*buffer. More detail in the datasheet.*/
{
SPI_WriteByte(string[i]);
delay(30);
}
CS_1; //inactive the device
delay(2);
//buffer to memory
CS_0;
delay(2);
if(buffer_choice)
SPI_WriteByte(0x86); //buffer 2
else
SPI_WriteByte(0x83); //buffer 1
tt=(BYTE)(page >>6);
SPI_WriteByte(tt); //6 ÎÒ¸ÄΪ7
tt=(BYTE)(page <<2);
SPI_WriteByte(tt);
SPI_WriteByte(BYTE_DUMMY);
CS_1;
delay(2);
IsBusy();
}
//******************************************************
unsigned char ReadFlashState(void)
{
unsigned char result=0;
CS_0;
delay(2);
SPI_WriteByte(0XD7);
result=SPI_ReadByte();
CS_1;
delay(2);
return result;
}
دیدگاه